Oil burner



Dec. 23, 1941. M. H. DUNN 2,267,643

OIL BURNER Filed June 2'7, 1940 2 Sheets-Sheet l De 23, 1941. M H DUNN 2,267,643

OIL BURNER Filed June 27, 1940 2 Sheets-Sheet 2 Patented Dec. 23, 1941 UNITED STATES PATENT OFFICE OIL BURNER Marion H. Dunn, Big Rapids, Mich.

Application June 27, 1940, Serial No. 342,820

3 Claims.

This invention relates to an oil burner construction and organization wherein it is used in a cook stove and heater unit.

It is particularly aimed to provide a construction which attains maximum economy and will burn especially cheap grades of oil in combination with air.

The more specific objects and advantages will be pointed out or become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment.

In said drawings:

Figure 1 is a view of the invention in plan;

Figure 2 is a vertical section taken on the plane of line 2-2 of Figure 1;

Figure 3 is a longitudinal section taken on the line 3--3 of Figure 1, and

Figure 4 is a cross section taken on the line 44 of Figure 3.

Referring specifically to the drawings wherein like reference characters designate like or similar parts, a metallic casing or body I is provided for the cook stove or heater with one end of which a fire box H is associated, the latter being interiorly lined where desired with fire brick or refractory material [2.

A burner opening is provided at the relatively fiat top of the fire box as at 13 and it is preferably equipped with a grate I4. An air inlet opening I5 is provided in the top of the fire box and below the same is an oil burner nozzle l6, which extends through and is mounted in the outer end of the fire box. As shown in Figure 3, such nozzle discharges at a zone where maximum heat will be realized at the burner opening 13. The outlet of the fuel is controlled through the adjustment of a needle valve I1 screwed as at H into the nozzle. Behind the needle valve, an air inlet tube It is adapted to discharge air, such tube passing through the opening l5 and extending interiorly across the top of the fire box. The admission of such air through the tube I8 is im portant in maintaining combustion and in enabling the use of maximum fuel.

The fuel oil is preferably supplied from an overhead tank I 9 having a pipe or conduit 20 leading therefrom to the nozzle I6 and including a fuel cut-off valve at 2|.

Covers 22 and 23 are pivoted on a rod 24 mounted on the fire box, which covers are movable to fiat positions over the burner l3 and opening l5, respectively, such covers being supported in open positions on rests 25 formed on the fire box.

Behind the fire box I l, the casing IE! is enlarged to provide a chamber 26 wherein an oven 21, formed by a cylindrical or other shaped drum is provided. Another drum 28, may be provided in spaced relation to the drum 2'! and concentric therewith, as shown in Figure 3, to prevent undue radiation of heat from the oven. Said oven is closed at one end but at the other end is open and access thereto is had through a door 29 pivoted on a vertical axis at 30 to the casing and having a conventional latch 3| associated therewith.

Heated air is gathered from the fire box and passes through a tube or duct 32 which is open in such fire box as best shown in Figure 3. Duct 32 is mounted in the walls at the front and rear of the compartment 26 and leads to a discharge flue 33 preferably having a damper 34 therein. Articles in the oven 21, may be supported in any suitable manner as on a removable shelf 35, resting on brackets 36 therein.

It will be noted that shelves 3'! and 38 are provided at the top of chamber 26. Sufiicient heat is provided at the shelf 31 for certain cooking but since the drum 28 contacts the shelf 31, only sufiicient heat reaches the shelf 38 to enable the latter to be used for warming purposes, for articles disposed thereon.

Various changes may be resorted to provided they fall within the spirit and scope of the invention.

I claim as my invention:

1. A stove of the class described having a fire box, a drum forming an oven, a duct communicating with the fire box and passing through the drum so that heated air from the fire box will pass through the duct to heat the oven, a second drum, said second drum being disposed about and spaced from the first drum, a casing within which the drums are disposed, the second mentioned drum engaging the upper portion of the casing to provide cooking and warming surfaces on opposite sides of such junction.

2. A stove of the class described having a fire box, a drum forming an oven, a duct communicating with the fire box and passing through the drum so that heated air from the fire box will pass through the duct to heat the oven, a second drum, said second drum being disposed about and spaced from the first drum, a casing within which the drums are disposed, the second mentioned drum engaging the upper portion a of the casing to provide cooking and warming surfaces on opposite sides of such junction, said about and spaced from the first drum, a casing within which the drums are disposed, the second mentioned drum engaging the upper portion of the casing to provide cooking and warming surfaces on opposite sides of such junction, a cooking grill at the top of the fire box, Oil burner means disposed in the fire box.

MARION H. DUNN. 

